From the storied turn of the 20th Century American Jewelers Osty & Barton, this shimmering 1.92 carats Old European Cut Diamond ring. Certified G.I.A. report #6207203988 stating the diamond is I color – SI2 clarity. To add to its provenance, the 14KT yellow gold, six prong setting is stamped with the distinctive makers mark “O.B. 14K”. Circa 1900s.